Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantas posições de pole position houve para a temporada de 2011?
 ###Tabelas: CREATE TABLE senior_career (senior_career_id AUTO_INCREMENT PRIMARY KEY, Year INT, Competition Description VARCHAR, Location VARCHAR, Apparatus VARCHAR, Rank-Final INT, Score-Final INT) CREATE TABLE career_summary (career_summary_id AUTO_INCREMENT PRIMARY KEY, Season INT, Series VARCHAR, Team VARCHAR, Races INT, Wins INT, Poles INT, F/Laps INT, Podiums INT, Points VARCHAR, Position VARCHAR) CREATE TABLE men's_indoor_tournament (men's_indoor_tournament_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Height VARCHAR, Weight VARCHAR, Spike VARCHAR, 2008 club VARCHAR) CREATE TABLE reactors (reactors_id AUTO_INCREMENT PRIMARY KEY, Unit VARCHAR, Type VARCHAR, Net power VARCHAR, Total power VARCHAR, Construction start VARCHAR, Construction finish VARCHAR, Commercial operation VARCHAR, Shut down VARCHAR) CREATE TABLE starters_for_2_different_teams (starters_for_2_different_teams_id AUTO_INCREMENT PRIMARY KEY, Quarterback VARCHAR, Games INT, Teams VARCHAR, Wins INT, Losses INT, Percent INT)  
SELECT MAX Poles FROM career_summary WHERE Season = 2011